https://www.reefsupplies.ca/online-s...ch-bucket.html
It does say that it does have the major and minor trace elements and for me it has worked well and 6 gals a year for the ease and 180$ cad dollars no driving around , have the proper scale to weight the product and not sure but do the others settle out but I only have 280 gals total. What ever works for you works best. I also have to say though that my top off water come straight out of the lake